| 单词 | sphincter |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔achalasia〕The failure of a ring of muscle fibers, such as a sphincter of the esophagus, to relax.弛缓不能：指肌肉纤维不能松弛，如食道内的括约肌美国传统〔gastric reflux〕A backflow of the contents of the stomach into the esophagus, caused by relaxation of the lower esophageal sphincter.反胃：胃里的待消化物逆流回食道中，由于下食道扩约肌放松的关系美国传统 |
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